package net.fdukedom.chart;

/**
 * @author Dmitry Y. Kochelaev
 * @author Fedor Tsarev
 */
public interface Function2D {

    /**
     * Returns true if graphic of function contains dot (x, y).
     * @param x x coordinate
     * @param y y coordinate
     * @return true if graphic of function contains dot (x, y) 
     */
    public double value(double x, double y);
}
